Price Extractor

The provided code represents a simple web application named "Price Extractor." It allows users to input a URL, and upon submission, the application extracts and displays any prices found within the content of the specified URL.


// This function extracts prices from a given URL.
function extractPrices(url) {
  // Define a regular expression pattern to match prices in the URL.
  const pricePattern = /\$\d+/g;

  // Use the pattern to find all matches of prices in the URL.
  const matches = url.match(pricePattern);

  // If there are matches, convert each match to a price string without the dollar sign.
  if (matches) {
    const prices = matches.map(match => match.substring(1));

    // Join the price strings with a comma separator.
    const priceString = prices.join(", ");

    // Return the price string.
    return priceString;
  }

  // If there are no matches, return -1 to indicate that no prices were found.
  return -1;
}

This code defines a function called extractPrices, which takes a URL as an argument. It uses a regular expression pattern to find all occurrences of a dollar sign followed by one or more digits in the URL. If there are any matches, it extracts the prices by removing the dollar sign and creates a comma-separated string of the prices. If there are no matches, it returns -1.

<!DOCTYPE html>
<html>
  <head>
    <title>Price Extractor</title>
    <link rel="stylesheet" type="text/css" href="styles.css" />
  </head>
  <body>
    <h1>Price Extractor</h1>
    <input type="text" id="inputText" placeholder="Enter text with prices" />
    <button onclick="priceChecker()">Extract Prices</button>
    <p id="priceResult"></p>
    <script>
      const priceChecker = () => {
        const inputText = document.getElementById("inputText").value;
        const prices = extractPrices(inputText);
        console.log(prices);
      };

      // This function extracts prices from a given URL.
      function extractPrices(url) {
        // Define a regular expression pattern to match prices in the URL.
        const pricePattern = /\$\d+/g;

        // Use the pattern to find all matches of prices in the URL.
        const matches = url.match(pricePattern);

        // If there are matches, convert each match to a price string without the dollar sign.
        if (matches) {
          const prices = matches.map((match) => match.substring(1));

          // Join the price strings with a comma separator.
          const priceString = prices.join(", ");

          // Return the price string.
          return priceString;
        }

        // If there are no matches, return -1 to indicate that no prices were found.
        return -1;
      }
    </script>
  </body>
</html>